Update 4-2-B2C-Secured-API.sln

Updated solution to newer verion of visual studio

Author: nickdip

Diff for: 4-WebApp-your-API/4-2-B2C/4-2-B2C-Secured-API.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.28803.352
+# Visual Studio Version 17
+VisualStudioVersion = 17.11.35327.3
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{DDAC3758-9CAE-4790-84B1-5B6258BAE44E}"
 	ProjectSection(SolutionItems) = preProject